Steam-generator



' (No Model.)

3 sheets -sheet 1. H. B. FRANZ. STEAM GENERATOR.

Patented Oct. 16,1894.

2 t e e h s t e e h S 3 (No Model.)

" H. E. FRANZ.

STEAM GENERATOR. No. 527,526.

Patented Oct. 16, 1894.

i llIlllllllllllllllllllllllllllllllllllllllllllimll ll illlll (No.Modei.)

\fll' STEAM GENERATOR.

No. 527,526. Patented Oct. 16, 1894.

3 Sheets-Sheet 3. H. E. FRANZ.

To all whom it may concern.-

UNiTnD. STATES PATENT OFFICE.

HERMAN E. FRANZ, OF BALTIMORE, MARYLAND.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 527,526, dated October16, 1894. Application filed April 20, 1.894. Serial No. 508,269. (Nomodel.)

Be it known that I, HERMAN E. FRANZ, a c tizen of the United States,residing at the city of Baltimore, in the State of Maryland,

' have invented certain new and useful Improvements in Steam-Generators;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to steam generators and has especial reference tothat class of water tube generators of pipe construction in which anumber of tubes constituting the chief heating surface are connected toheaders which afford the means of conducting the water and steam fromthe tubes, as well as supplying the tubes with water from which steam isgenerated, the headers in turn being connected together by a receiveror. other means into which they discharge. The freedom of thecirculation of the water depends in a great measure upon the form of theheaders and the disposition of the tubes which connect them. Theprevailing construction is to have the tubes disposed in horizontal rowsacross the generator and the furnace, with a descending inclination ofthe tubes from the front to the rear. In such constructions it isdifficult to make a generator of this description self contained so thatit can be employed for marine purposes.

. The object of this invention is to provide the means to make a watertube steam generator that will be self contained, that will be compact,of medium weight, contain ample heating surface, afford free circulationof the water, be easy of access for cleaning or repairing, simple inconstruction, of great strength, combining therewith a separator and beeconomical in first cost, in operation and in maintenance. To accomplishthese important desiderata a sinuous header is devised, having anascendinginclination from the sides of the generator to the transversecenter thereof or vice versa. The header may be single or double,according to the size of the generator. For large generators a singleheader is preferable. For small generators a The invention will be fullydisclosed in the following specification and claims.

In the accompanying drawings, which form part of this specificationFigure 1 1s a perspective of a single header and showing the frontthereof; Fig. 2, a like view showing the rear of said header; Fig. 3, alike view of a double header showing the front with all the hand-holecovers removed; Fig. 4., a like view of a double header showing the rearof said header and all of these figures show the headers on an enlargedscale compared with the remaining figures of the drawings. Fig. 5represents a front elevation of a steam generator of my improvedconstruction, showing the headers in position on one side of thevertical transverse center of the generator, and the headers removed onthe opposite side of said center, the water-drum in section and thefront receiving pipe broken off to expose the crown of the furnace orcombustion chamber, and Fig. 6 a vertical longitudinal section showingthe separator and one water-d rum in side elevation.

Reference being had to the drawings, and the letters thereon A indicatesa single header which is rectangular in form and inclined toward thevertical transverse center of the generator, and is provided in itsfront side with hand-holes a through which the tubes are expanded andcleaned, with a handhole I) through which the nipple c which connectsthe header to the water conveyer is expanded in the hole (1 in theheader, and with suitable hand-hole covers c secured by dogs f and boltsg of the usual construction; and in the rear side with holes h toreceive water tubes and which holes and tubes are arranged in groupspreferably of six as shown in Figs. 2, 5 and 6, and with a hole at toreceivethe nipple o. By grouping a number of small tubes a greater areaof heating surface is obtained within the same area than when largetubes are used.

13 indicates a double header which is of the same general form as theheader A, is

provided on its front side with hand-holes a and b, and in its rear sidewith holes d d for nipples to connect the header with a conveyer, holesh to receive water tubes and with hole '5 in the center to connect witha circulating pipe (not shown) between the headers.

The inclination of the headers across the generator allows the tubes tobe so disposed as to afford ample furnace room and a spacious combustionchamber, and at the same time protect the sides of the combustionchamber by intercepting the heat at that point, thereby reducing theamount of brick work or other refractory material necessary to protectthe sides.

The headers are assembled in a generator one above another to anydesired height and inany convenient number and the front headers areconnected to a receiver or uptake pipe 0 by the nipple c as shown inFigs. 5 and 6, and the receiver communicates with the front end of theseparator D which is located at the top and in the transverse center ofthe generator. Each rear header is similarly, connected to acorresponding receiver or down-take E communicating with a water drum Flocated above the headers and on one side of the separator D. The rearheaders are arranged on a lower plane than the front headers to providethe proper inclination of the water tubes G which connect the front andthe rear headers.

The separator D communicates with the water-drums F by means of pipes H,H, in front of the longitudinal center of the separator, and by pipes I,I, in the rear of said center, and said pipes are so connected to thewater-drums that the water flowing from the separator to the drumsenters the latter about the waterline, as shown in Fig. 5, and thewater-drums F are connected to the receiv ers or down-take pipes E bypipes K, which communicate with the drums near the bottom thereof.

By the system of pipe connections described perfect and free circulationof the water in the generator is maintained and the separator iscontained within the casting L of the generator.

It will be observed that the water-drums and the steam drum andseparator are all we posed to the products of combustion from thefurnace, and in order to confine and direct the gases emanating from thefuel to the water tubes G, a crown M is interposed in the, upper part ofthe combustion chamber and between the tubes connecting the upperheaders, and from the crown extends a flange N on each side to directthe gases outward through the spaces between the tubes and upward aroundthe drums F.

The front headers are suspended at their inner ends from the separatorD, by rods which engage lugs Z on the lower headers, and at their outerends from the drum Fby I rods m which engage lugs 11., as shown in Figs.5 and 6.

It is obvious that the headers may be inclined downward from the sidestoward the center of the generator or they may be curved or sinuouswithout departing from the spirit of my invention so long as the headersare inclined, and good results may be obtained from such constructions.

An ordinary steam and water gage 0 may be attached to the separator andone of the drums as shown in Fig. 5.

The furnace may be of any approved form of construction and forms nopart of my present invention.

Having thus fully described my invention, what I claim is l. A headerinclined inwardly toward the transverse center of a steam generator andprovided with openings for water circulating tubes and an opening toconnect with a water conveyer on the side toward the longitudinal centerof the generator and with hand-holes opposite said openings.

2. A header inclined inwardly from both sides of and toward the centerof a generator and provided with holes in one of its walls for thereception of tubes, hand-holes in the op posite walls, and an opening inthe upper wall to communicate with a circulating pipe.

3. The combination of a plurality of headers inclined toward thecenterof a generator and connected at their inner ends to a receiver orup-take pipe, a separator with which said receiver communicates, and awater drum communicating with the rear header.

4. Thecombination of a plurality of headers inclined toward the centerof a generator and arranged one above the other, the front headersconnected to a receiver or up-take pipe communicating with a separator,a pair of water drums below and on each side of the separator andconnected by pipes communicating with the lower part of the separator,and a receiver or down-take communicating with the rear end of saiddrums and with the rear headers.

In testimony whereof'l affix my signature in presence of two witnesses.

HERMAN E. FRANZ.

Witnesses:

D. C. REINoHL, D. W. REINOHL.

Correction in Letters Patent No. 527,526.

Aflidavit having been fiied showingthat the name of the patentee 1ncenters :atent No. 527,526, granted October 16, 1894, for an improvementin fteam-uenerarors. should have been written and printed Herman E.Frauz instead of Herman 1111;. it is hereby certified that the propercorrection has been made 1n the ales um pertaining to the casein thePatent Oflice, and should be read 111 me ACL'ZQZE that the same mayconform thereto.

Signed, countersigned, and sealed this 23d day of October, A. D, 1894.

[SEAL-1 JNO. M. REYNOLDS, r Assistant Secretary of the Interior.Gountersigned:

JOHN S. SEYMOUR,

Gommissioner of Patents.

